Effect of Heat Treatments for Electroless Deposited Ni-B and Ni-W-B Coatings on 7075 Al Alloy

Yildiz, Rasid Ahmed; Genel, Kenan; Gülmez, Turgut

doi:10.18178/ijmmm.2017.5.2.295

Cited by 20 publications

(18 citation statements)

References 12 publications

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“…The amorphous precipitates get crystallized above 320ºC . corrosion resistance and wear resistance increased duo to The formation of Ni3P [9][10]. the temperature is important and should be the same in the whole bath that can be done by agitation of the solution .…”

Section: Introductionmentioning

confidence: 99%

Improve Wear Resistance by Nano Composite Electro Less Coating for Low Alloy Steel (Ni-P-Graphene)

2020

jcr

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Several experiments were carried out for the electroless coating process , Sodium hypophosphate with (10 , 14 and 24)g/l were added to achieve low , medium and high phosphorous in electro less coating for low alloy steel , the coating time (45 ,75 and 105)min and use different heat treatment temperatures (200,300 and 400)°∁ . Wear resistance was tested by ASTM G99 to evaluate the best result of creating a nano composite coating, in order to add Nano graphene , the graphene was added by (0.1 , 0.3 , 0.5 and 0.7) g /l. to coating bath . The FESEM filed emission scanning electron was conduct , x-ray diffraction to figure out the alloy compound on the layer coating , EDS energy dispersive spectroscopy to calculate the wt% P for low , medium and high , the pin on disk type were accomplished to evaluate the coating best result against the wear resistance. The results of the experiments showed that the coating with different weight% P, different coating time and different heat treatment temperature leads to improved wear resistance due to increased hardness and reduced friction coefficient by the addition of graphene.

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Section: Introductionmentioning

confidence: 99%

Improve Wear Resistance by Nano Composite Electro Less Coating for Low Alloy Steel (Ni-P-Graphene)

2020

jcr

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“…Mechanical alloying can be used to overcome this difficulty. In this way, Ni-B intermetallics can be produced which have lower melting degrees than nickel and melting degrees of the pipe [10,11]. Among the nickel and boron, there are many intermetallic phases such as Ni 3 B, Ni 2 B, Ni 4 B 3, and NiB.…”

Section: Introductionmentioning

confidence: 99%

Microstructure, wear and corrosion properties of NiB-TiC composite materials produced by powder metallurgy method

Akkaş

Islak

2019

SCI SINTER

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In this study, NiB-TiC composite materials were produced using powder metallurgy. In the Ni-TiC-B powder mixture, TiC was fixed at a rate of 5 %, 5, 10 and 15 % boron was added and mechanical alloying was carried out. The prepared powder mixtures were cold pressed under pressure of 400 MPa and sintered in an argon atmosphere at 800 o C for 2 hours. Microstructure, phase formation, hardness, wear and corrosion properties of the samples were investigated in detail. Scanning electron microscopy (SEM) was used for microstructure analysis and X-ray diffractogram (XRD) was used for phase formation detection. The hardness measurements of the samples were measured by a microhardness measuring device. Densities of the samples were determined by Archimedes' principle. The corrosion tests were performed potentiodynamic polarization curves of the composite materials in 3.5 % NaCl solution. Wear tests were carried out the composite materials under a load of 10 N. Results showed that by increasing the amount of B, the wear and corrosion resistance increased.

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“…The formation of Ni 3 P increases hardness and resistance to wear at the expense of formability and resistance to corrosion. [18][19][20][21] Temperature is another important factor for the properties of Ni-P electroless coatings. It was found that the reductioning agent and the complexing agent in the Ni-P electroless process is dependent on the temperature.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Electroless Bath Parameters and Heat Treatment on the Properties of Ni-P and Ni-P-Cu Composite Coatings

et al. 2018

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NiP -(Cu) composite coatings were applied on a St37 steel in an acidic bath of hypophosphite composite. The effect of the concentration of the Cu particles and pH of the solutionon the amount of Ni and P of the coatings, their morphology, and hardness of the coatings were explored. Some of the coated samples were also heat treated at 400ºC for 1 hour. The phases formed, the microstructure and the amount of the alloying elements of the coatings were analyzed by X-Ray powder diffraction (XRD), Scanning Electron Microscope (SEM) equiped with Energy Dispersive Spectroscopy (EDS). Results show that although adding Cu particles reduced the hardness of NiP coating (from 482.4 to 351.2 VH in 1 gr/lit Cu), within NiP -Cu composite coatings the hardness of NiP -Cu composite coating increased from 351.2 to 380.7 VH by increasing the Cu particles from 1 to 7 gr/lit. The structure of the coating was crystalline during the heat treatment making the coating harder. With increasing the pH of the solution from 4.5 to 7 and then to 9, the weight percent of P and the particle of Cu were reduced.

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Effect of Heat Treatments for Electroless Deposited Ni-B and Ni-W-B Coatings on 7075 Al Alloy

Abstract: Abstract-Electroless

Cited by 20 publications

References 12 publications

Improve Wear Resistance by Nano Composite Electro Less Coating for Low Alloy Steel (Ni-P-Graphene)

Improve Wear Resistance by Nano Composite Electro Less Coating for Low Alloy Steel (Ni-P-Graphene)

Microstructure, wear and corrosion properties of NiB-TiC composite materials produced by powder metallurgy method

The Effect of Electroless Bath Parameters and Heat Treatment on the Properties of Ni-P and Ni-P-Cu Composite Coatings

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